APPENDIX G
CRYOGENIC FLUIDS—WEIGHT AND VOLUME EQUIVALENTS
This appendix is for information purposes and is not intended for adoption.
SECTION G101
GENERAL
G101.1 Scope. This appendix is used to convert from liquid to
gas for cryogenic fluids.
G101.2 Conversion. Table G101.2 shall be used to determine
the equivalent amounts of cryogenic fluids in either the liquid
or gas phase.
G101.2.1 Use of the table. To use Table G101.2, read horizontally across the line of interest. For example, to determine the number of cubic feet of gas contained in 1.0 gallon
(3.785 L) of liquid argon, find 1.000 in the column entitled
“Volume of Liquid at Normal Boiling Point.” Reading
across the line under the column entitled “Volume of Gas at
70°F and 1 atmosphere 14.7 psia,” the value of 112.45 cubic
feet (3.184 m3) is found.
G101.2.2 Other quantities. If other quantities are of interest, the numbers obtained can be multiplied or divided to
obtain the quantity of interest. For example, to determine the
number of cubic feet of argon gas contained in a volume of
1,000 gallons (3785 L) of liquid argon at its normal boiling
point, multiply 112.45 by 1,000 to obtain 112,450 cubic feet
(3184 m3).
2007 OREGON FIRE CODE
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APPENDIX G
TABLE G101.2
WEIGHT AND VOLUME EQUIVALENTS FOR COMMON CRYOGENIC FLUIDS
CRYOGENIC
FLUID
WEIGHT OF LIQUID OR GAS
VOLUME OF LIQUID AT NORMAL
BOILING POINT
VOLUME OF GAS AT NTP
Pounds
Kilograms
Liters
Gallons
Cubic feet
Cubic meters
Argon
1.000
2.205
3.072
11.628
10.340
3.652
0.454
1.000
1.393
5.274
4.690
1.656
0.326
0.718
1.000
3.785
3.366
1.189
0.086
0.190
0.264
1.000
0.889
0.314
9.67
21.32
29.71
112.45
100.00
35.31
0.274
0.604
0.841
3.184
2.832
1.000
Helium
1.000
2.205
0.275
1.042
1.034
0.365
0.454
1.000
0.125
0.473
0.469
0.166
3.631
8.006
1.000
3.785
3.754
1.326
0.959
2.115
0.264
1.000
0.992
0.350
96.72
213.23
26.63
100.82
100.00
35.31
2.739
6.038
0.754
2.855
2.832
1.000
Hydrogen
1.000
2.205
0.156
0.591
0.521
0.184
0.454
1.000
0.071
0.268
0.236
0.083
6.409
14.130
1.000
3.785
3.339
1.179
1.693
3.733
0.264
1.000
0.882
0.311
191.96
423.20
29.95
113.37
100.00
35.31
5.436
11.984
0.848
3.210
2.832
1.000
Oxygen
1.000
2.205
2.517
9.527
8.281
2.924
0.454
1.000
1.142
4.321
3.756
1.327
0.397
0.876
1.000
3.785
3.290
1.162
0.105
0.231
0.264
1.000
0.869
0.307
12.00
26.62
30.39
115.05
100.00
35.31
0.342
0.754
0.861
3.250
2.832
1.000
Nitrogen
1.000
2.205
1.782
6.746
7.245
2.558
0.454
1.000
0.808
3.060
3.286
1.160
0.561
1.237
1.000
3.785
4.065
1.436
0.148
0.327
0.264
1.000
1.074
0.379
13.80
30.43
24.60
93.11
100.00
35.31
0.391
0.862
0.697
2.637
2.832
1.000
1.000
2.205
0.951
3.600
4.356
11.501
0.454
1.000
0.431
1.633
1.976
5.217
1.052
2.320
1.000
3.785
4.580
1.616
0.278
0.613
0.264
1.000
1.210
0.427
22.968
50.646
21.812
82.62
100.00
35.31
0.650
1.434
0.618
2.340
2.832
1.000
a
LNG
For SI: 1 pound = 0.454 kg, 1 gallon = 3.785 L, 1 cubic foot = 0.02832 m3, °C = [(°F)-32]/1.8, 1 pound per square inch atmosphere = 6.895 kPa.
a. The values listed for liquefied natural gas (LNG) are “typical” values. LNG is a mixture of hydrocarbon gases, and no two LNG streams have exactly the same
composition.
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2007 OREGON FIRE CODE